CVE-2024-26001
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn unauthenticated remote attacker can write memory out of bounds due to improper input validation in the MQTT stack. The brute force attack is not always successful because of memory randomization.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceAn unauthenticated remote attacker can write memory out of bounds due to improper input validation in the MQTT protocol stack. This is a critical memory corruption vulnerability that allows remote code execution without authentication, though exploitation reliability is reduced by memory randomization mechanisms.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 1.5.1< 1.5.1< 1.5.1< 1.5.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the device modelLocate the physical device label or check the device's web interface or system information to confirm it is a Phoenixcontact Charx Sec 3000, 3050, 3100, or 3150Affected if The device is not one of these four models, the vulnerability does not apply
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Check the installed firmware versionAccess the device's admin interface or use the vendor's management tool to retrieve the current firmware version. Compare it to the affected threshold of 1.5.1Affected if Firmware version is below 1.5.1 (for example, 1.4.0, 1.3.2, etc.)
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Verify if MQTT is enabledCheck the device configuration settings or network services list to determine whether the MQTT protocol stack is active on the deviceAffected if MQTT is enabled and running; the vulnerability exists in the MQTT implementation, so unused MQTT does not pose immediate risk
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Assess MQTT network exposureReview firewall rules or network access controls to determine whether the MQTT port is accessible from untrusted networksAffected if MQTT port (default 1883 or configured custom port) is exposed to untrusted or public networks
You are affected if you have a Charx Sec 3000/3050/3100/3150 device running firmware version below 1.5.1 with MQTT enabled and accessible.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped1.5.1
Apply vendor patches for the affected MQTT implementation; until patched, restrict MQTT port access to trusted networks or implement network-level filtering to reduce attack surface.
Charx Sec 3000/3050/3100/3150 Firmware version 1.5.1
- Identify the specific Charx Sec model (3000, 3050, 3100, or 3150) currently deployed
- Navigate to the vendor's official support or firmware download page at cert.vde.com or the Charx manufacturer website
- Download Charx Sec firmware version 1.5.1 or later for your specific model
- Review the vendor's firmware upgrade instructions document
- Follow the vendor-recommended procedure to upload and install the firmware, typically via the device's web management interface or dedicated upgrade tool
- After upgrade, verify the running firmware version displays 1.5.1 or later
- Confirm the MQTT service is functioning normally post-upgrade
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation6.0 h
- Implementation12.0 h
- Testing10.0 h
- Review / QA6.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-26001 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2024-26001 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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